Fix tseries.offsets docstrings with missing period in the summary (set 2)

[bhuvanakundumani]

Same as #132 but for the next docstrings:

pandas.tseries.offsets.QuarterOffset.normalize: Summary does not end with a period
pandas.tseries.offsets.BQuarterEnd.normalize: Summary does not end with a period
pandas.tseries.offsets.BQuarterBegin.normalize: Summary does not end with a period
pandas.tseries.offsets.QuarterEnd.normalize: Summary does not end with a period
pandas.tseries.offsets.QuarterBegin.normalize: Summary does not end with a period
pandas.tseries.offsets.YearOffset.normalize: Summary does not end with a period
pandas.tseries.offsets.BYearEnd.normalize: Summary does not end with a period
pandas.tseries.offsets.BYearBegin.normalize: Summary does not end with a period
pandas.tseries.offsets.YearEnd.normalize: Summary does not end with a period
pandas.tseries.offsets.YearBegin.normalize: Summary does not end with a period
pandas.tseries.offsets.FY5253.normalize: Summary does not end with a period
pandas.tseries.offsets.FY5253Quarter.normalize: Summary does not end with a period
pandas.tseries.offsets.Easter.normalize: Summary does not end with a period
pandas.tseries.offsets.Tick.normalize: Summary does not end with a period